:root {
  --primary: #27ae60;
  --dark: #2c3e50;
  --light: #c2ccf3;
}

body {
  margin: 0;
  font-family: 'Segoe UI', Arial, sans-serif;
  background: var(--light);
  color: var(--dark);
}

/* HEADER */
header {
  background: var(--dark);
  color: #fff;
  padding: 3rem 1rem;
  text-align: center;
  animation: fadeIn 1.3s ease-in-out;
}

header h1 {
  margin: 0;
  font-size: 2.8rem;
  letter-spacing: 1px;
}

header p {
  margin-top: .5rem;
  font-size: 1.2rem;
  opacity: .9;
}

/* HERO */
.hero {
  text-align: center;
  padding: 3rem 1.5rem;
  animation: slideUp 1.3s ease-in-out;
}

.hero h2 {
  margin-bottom: .5rem;
  font-size: 2rem;
}

/* GALLERY */
.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(700px, 1fr));
  gap: 5rem;
  padding: 4rem;
  max-width: 3000px;
  margin: auto;
}


.card {
  background: #b7d3d3;
  border-radius: 25px;
  overflow: hidden;
  box-shadow: 0px 4px 20px rgba(54, 53, 53, 0.12);
  transition: all 0.3s ease;
  min-height: 800px;
  padding: 15px;
  display: inline-block;
  width: 700px;
  height: auto;
  margin: 50px;
  border: 1px solid #ccc;
}

.card:hover {
  transform: translateY(-7px) scaleX(1.3) scaleY(1.0);
  background: #51dfdf;       /* nuevo color al hacer hover */
  min-height: unset;
  max-height: fit-content;
  padding-bottom: 0;
}

.card img {
  width: 100%;
  height: auto;
  max-height: 1850px;
  object-fit: contain;
}

.card p {
  padding: 1rem;
  font-size: 1rem;
  line-height: 1.4;
}

/* CTA */
.cta {
  margin-top: 3rem;
  padding: 4rem 1rem;
  text-align: center;
  background: var(--primary);
  color: #fff;
  animation: fadeIn 2s ease-in-out;
}

.cta h2 {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.cta button {
  background: #fff;
  color: var(--primary);
  border: none;
  padding: 1rem 2rem;
  border-radius: 5px;
  font-size: 1.1rem;
  cursor: pointer;
  transition: .3s ease;
}

.cta button:hover {
  color: #fff;
  background: var(--dark);
}

/* Animaciones */
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes slideUp { from { transform: translateY(40px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }

/* RESPONSIVE */
@media (max-width: 768px) {
  header h1 { font-size: 2.2rem; }
  .cta h2 { font-size: 1.6rem; }
}

.step-title {
  font-size: 1.2rem;
  color: #2c3e50;
  font-weight: bold;
}

.step-desc {
  font-size: 1rem;
  color: #34495e;
}

.highlight {
  color: #27ae60; /* Verde para resaltar */
  font-weight: bold;
}

.error {
  color: #e74c3c; /* Rojo para errores */
  font-weight: bold;
}

.success {
  color: #27ae60; /* Verde para éxito */
  font-weight: bold;
}

.card.about {
  max-width: 2000px;            /* ancho máximo para que no se extienda demasiado */
  margin: 20px auto;           /* centrado con espacio alrededor */
  padding: 20px;               /* espacio interno */
  border: 1px solid #ccc;      /* borde suave */
  border-radius: 40px;         /* esquinas redondeadas */
  background: #fdfdfd;         /* fondo claro */
  box-shadow: 0 4px 8px rgba(0,0,0,0.1); /* sombra ligera */
}

.card.about h2 {
  font-size: 2.1rem;           /* título más grande */
  color: #2c3e50;              /* gris oscuro elegante */
  margin-bottom: 15px;
  text-align: center;          /* centrado */
}

.card.about p {
  font-size: 1rem;
  line-height: 1.6;            /* mejor legibilidad */
  color: #34495e;              /* tono gris azulado */
  margin-bottom: 12px;
}

.card.about strong {
  color: #27ae60;              /* verde para resaltar tu nombre */
  font-weight: bold;
}

.card.about .highlight {
  color: #2980b9;              /* azul para destacar conceptos clave */
  font-weight: bold;
  background-color: #ecf6fc;   /* fondo suave para resaltar */
  padding: 2px 4px;
  border-radius: 4px;
}

#toggleAboutBtn {
  background-color: #2980b9;
  color: #fff;
  border: none;
  padding: 10px 15px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 1rem;
  margin-bottom: 10px;
}

#toggleAboutBtn:hover {
  background-color: #1f6391;
}

.card.about {
  max-width: 600px;
  margin: 0 auto;
  padding: 20px;
  border: 1px solid #ccc;
  border-radius: 10px;
  background: #fdfdfd;
  box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

.card.about h3 {
  font-size: 1.2rem;
  color: #2c3e50;
  margin-top: 15px;
  margin-bottom: 8px;
}

.info {
  color: #2980b9; /* Azul para datos */
  font-weight: bold;
}

.success {
  color: #27ae60; /* Verde para positivo */
  font-weight: bold;
}

.error {
  color: #e74c3c; /* Rojo para costos altos */
  font-weight: bold;
}

.highlight {
  color: #f39c12; /* Naranja para resaltar */
  font-weight: bold;
}